SEVERE WX : Excessive Heat Warning View Alerts

June 21, 2 PM Weather Forecast Update

Showers, storms & muggy weather ahead.

Posted: Jun 21, 2019 1:25 PM
Updated: Jun 21, 2019 5:04 PM

Veil of clouds continues to thicken over the area with 1:45 p.m. temperatures at 72-76 over the viewing area. 

MCS is moving through Illinois & Missouri with two bows of severe storms.  Watches are lined up southwest of our area.

We will get in on some of the rain & thunder on the northern half of the MCS later today.

Once severe MCS progresses southeastward, new storms should pop on/near the warm front late evening-tonight. Those storms may impact part of the viewing area, mainly the southwestern half.

An isolated hailer or two is possible, along with locally-heavy rainfall.

Storms will be with us into the night & will expand northward.

All of ths will likely form another MCS with a well-defined MCV also developing.

It will all progress southeastward, but we may still have at least some showers & storms around as late as Saturday morning.

Those storms should pull away & weaken, leaving us with a dry Saturday late morning through afternoon & into the evening with partly cloudy skies & 78-86 with high humidity.

Some storms may fire on outflow boundary of morning storms southwest of our area late in the day, but we should still still dry, it appears.

Focus continues to be on Sunday late afternoon-evening.

MCV should be pivoting through northern Illinois & outflow boundary should be draped over central Illinois. 

Meanwhile, we will reside in a very warm to hot, oppressive & unstable airmass.

Line of severe storms is expected to develop & move eastward in the afternoon-evening, affecting our area around the 5-10 p.m. time frame.

Main threat is wind (including the potential of a few wet downbursts), but locally-heavy, torrential rainfall will occur.

Temperatures of 86-90 with dew points 75-78 are likely before the storms,leading to heat indices of 95-105.

Storms are possible Monday with some severe risk, followed by a dry Tuesday, then potential of storms Wednesday or Thursday.

After that, it looks pretty dry, very warm to hot & humid with storms returning around the July 4-6 time frame.

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Scattered Storms Return Sunday Afternoon
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